Although not technically a developer tool, it is worth mentioning the Logtalk compiler lint checker features as they contribute to earlier detection and warning of source code issues. Lint checks include:
- Missing directives (including scope, meta-predicate, dynamic, discontiguous, and multifile directives)
- Duplicated directives
- Missing predicates (calls to non-declared and non-defined predicates)
- Calls to declared but not defined static predicates
- Non-portable predicate calls, arithmetic function calls, directives, flags, and flag values
- Suspicious calls (syntactically valid calls that are likely semantic errors)
- Deprecated directives, control constructs, and flags
- References to unknown entities (objects, protocols, categories, or modules)
- Goals that are always true or always false
- Trivial goal fails (due to no matching predicate clause)
- Redefined built-in predicates
- Lambda expression unclassified variables and mixed up variables
- Singleton variables
Additional checks are provided by the make and dead_code_scanner tools.